Mill Creek Crystal Cave and the Mill Creek Melee February 11, 2021December 9, 2020 This content is for NRMG members only.Log In Register Related posts: Searching for Caves in the Northern Rocky Mountains Mystery Cave aka Mystic Cave Lillyguard: The Three Halves of Lillyguard Barton Creek, Panti Pit: Amblypygis, Mennonites, and Panti Raids. High water and a surprise passage. Lost Creek Siphon: The Carl Froslie Experience